Apparatus for testing hardness.



J, KRNBR.

APPARATUS POR TESTING HARDNESS.

APPLICATION FILED DBG. 30, 1910.

1,057,359. Patented Apr. 1, 191;

To all eli/7mm if' JESSE?? @5* GERMANY.

APPARTUS FSB TESTING -IJFLDNESS.

Sim- Itntenteti Apr. i, il 931.3.

f' Appbieeton filed December S0. i516. Serial En. 600,177.

may concern Le it knov u that Josee Kimm, subjest 'if the Gerin-en Emperor, residing et Stuttgart, the Empire' of Germany, have invented certain new und usefui imprevenients .in Apparatus for Testing Hardness, of which the following is speeilicatien,

This invention has for its object epj rretus for testing hardness. njhe epioarmus acts by tite force of the rebound ot e telling Weight, which strikes the articie 'to be tested, enti serves es measure of comparison for degree et heroine, s. According to this invention the failing weight is suspended pen.- (uium fashion, so that it can Y:tell frein e given height against the art-icieto be tested which is arranged et the lowest point of the pend'nium path, enti rebound therefrom., the height to which it rebounds, which serves e measure of the ieiness, being reed ofi on u seele. r

in exemple of construction of the inves tion is shown in side .View in the eeeompz-in)r1 ing drawing. A

The drop-Weight fa is suspended by ineens of e tube from the arde c, which is proionged into peints: d et bott, ends, which may be sere'vvec' into Esterel cheeks o a U- she'pefii 'freine or yeie j". The freine or yoke j is fixed by e. boit; g to the socket 7L mounted on a, column or piiiar 7L# and having e base 0*; foot-'i A quefirent m, provided with e, seele on which e. slide-piece n can inmfe and be by e. setserew 0, is seeurefl to tire yoke f by of e horizont-ei erin l, A

-spring i'izie on the siire-pieee 'n engages by means of :i bentup end behind e nose or projection g en the drop-weicht a, which is Shown reise in the dotted position, anti this Spring may be-bent backward or depressed by e pressure pin e, whereby the nese g is zeieesed und the Weight een (irop. En the lowest position of tiie'penuium path of the drop-Weight, e hardened pin u ixed on the istter encounters the artie'ie e to be teste. whereupon the dropweight is caused te re: bound more or ess strongly according to the hardness of the article. 1 Tite height reeeb eci on this rebound, which may be eenvenientiy reed ott' by an index treteiing @ver t'ne seele of the quedren fe, thus affords e. mees ure of the degree of hardness of the article tested.

The apparatus is particularly adapted for testing ber materiel the pin u striking against the end thereof By u suitable fornuitien of the bese or toot. 'J the apparatus um); also be diret-dy pinned on the ber to be tested, so that. it is possible te test heavy bers es regards hardness rapidly and Conveniently et their piace o' orage.

i declare that, what iv Glenn isz-- i. Appemtus for testing hardness Comprising u drop-weight, means for swingingiy sugperting said, weight', -i quafirant fixed on seid Ineens, ineens for indicating on the quadrant the extent of the rebound of the weight from the umteriei to be tested, a slide member on the quadrant, resilient Ineens on the slide member to engage the weight, and iepressibie ineens slidabiy ceri u the slide member to engage seit resiiient means and disengege the latter from tile Weight- 2, Apparatus for testing hardness, coniprising a, support, a drop-Weight swingingiy mounted on the support., e quecirent carried by said suppoit .on one side of the Weight, an indicator mounted on the weight en@ eX- tending therefrom to the opposite side of tbe quedrent to torni e guide for said Weight,- resiiient ineenson the slide member to engage the weight :uni depressibie means slidably ycarried by the siide member te engage seid resiiief ineens and oisenguge the letter from tiie weight.

3. Apparatus for testing hardness oomprising e support, u drop-Weightswingingly mounted thereon, means for reaing the rebound or" the weight, and e Weight, retaining member mijustubiy mounted on the support.

euri Comprising' a slide member, a Weight en gaging spring, anni a ciepressible pin to engage the spring upon depression of the pinv adapted to move, :i reeesable hoiing de vice adapted to retain sei. Weight. in the me memes@ raised position, said hoding device being admy name this 18th day of November 1910, in

justably mounted on the curvedhba, said bar the presence of two subscribing Witnesses.

also servin in conjunction Wit t e pointer for indieatiign the extenfof the rebound of JOSEF KKIRNER' the Weight a ter striking the matera to be Witnesses:

tested. FRIEDRICH MEHL In Witness whereof, I have hereunto signed CARL RUPP; 

